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(No Model.)

G. CRANE. Oil Still.

No. 231,280. Patented Aug. 17, 1880.

r 1 i g." I 7' a i i. i Z i i i 5 5 i i I i Z I i I C? h WITNESSESINVENTOR Mm/ BY ATTORNEYS.

N.PE7F.RS. PMOTO-LIYHOGRAFNER WASHINGTON. D c.

UNITED STATES PATENT OFFICE.

GERARD CRANE, OF SALAMANOA, NEW YORK.

OI L-STl LL.

SPECIFICATION forming part of Letters Patent No. 231,280, dated August17, 1880.

Application filed May 13, 1880.

To all whom it may concern Be it known that I, GERARD CRANE, ofSalamanca, in the county of Gattaraugus and State of New York, haveinvented a new and useful Improvement in Oil-Stills, of which thefollowing is a specification.

My invention consists in a novel arrangement of a small still within alarger or main still and another small still outside of said main still,and a novel combination and arrangement of devices employed inconnection therewith, whereby the process of distilling the oil isfacilitated and hastened by enabling the oil to give off the morevolatile products of distillation at the same time that the heavierproducts are being given off, and by means of the same fire for all ofsaid stills.

The accompanying drawing represents a vertical section of an apparatusembodying my improvement.

The main still consists of a tank, Aywhich may be of any suitable shapeand dimensions, but is here shown as of quadrangular form. Within thistank, near the top, is a smaller tank, B, arranged in an inclinedposition.

0 is a tank containing crude oil, and from this tank the oil is forcedin any suitable manner.

A pipe, D, leads from the tank 0 in an upwardly-inclined direction to apoint near one end of the still A, thence into said still and upwardlytoward the opposite end thereof, thence upward vertically, and thenceupward diagonally again to a point near the first-mentioned end of thestill A, at which point the pipe D enters the still B near its lowestend. This lowest end of the still B may be provided with a gage-pipe,I), to show the height of the oil therein at any time.

The highest end of the still B is provided wlth a pipe, E, leading to astill, G, on the top of the main still A, which still G is alsoinclined, but in an opposite direction to that of the still B.

From the highest end of the still G a pipe, H, leads upward, thenhorizontally, and then downward to a condenser, J, said pipe H belngprovided with stop-cocks h.

(No model.)

The top of the still A is provided with pipes P, which may be furnishedwith stop-cocks.

From the highest end of the still G a pipe, K, leads downward and intothe main still A.

The operation is as follows The oil is forced from the tank 0 up throughthe pipe D and into the interior still, B, and from thence through thepipe E to the still G, where the heat applied to the tank A issufficient to cause the oil to give off the benzine, naphtha, and othermore volatile products of distillation, which pass from thence throughthe pipe H to the condenser J. The stop-cocks h in the pipe II are forthe purpose of regulating the flow of benzine and other volatileproducts. When they are heaviest the cooks are turned so as to send themmore directly to the condenser, as will readily be understood on refer'ring to the drawing. As the more volatile products are given oil the oilpasses from the still G down through the pipe K to the main still A,where it goes through the ordinary process of distillation. As the crudeoil rises through the pipe D from the tank 0 the water, being heavierthan oil, will pass off through tlIie branch pipe L and be received inthe tank 1\/ Having thus described my invention, I claim as new anddesire to secure by Letters latent 1. The combination, with the mainstill A and interior still, B, of the crude-oil tank 0, connected by thepipe D with the interior still, as shown and described, for the purposespecifled.

2. The combination, with the main still A and interior still, B, of theexterior still, G, pipe E, pipe H, and condenser J, as herein shown anddescribed.

3. In an oil-still, the combination, with main still A and inclinedexterior still, G, of the connecting-pipe K, commencing at the highestend of the bottom of said exterior still and extending into the insideof main still, as shown and described.

Witnesses: GERARD CRANE.

A. S. VREELAND, T. W. LITOHFIELD.

